Abstract:
:The role of Schwann cells (SC) in perineurial regeneration after nerve injury has not yet been resolved. It was hypothesized that SC alone are able to induce at least partial morphological restoration of the destroyed orthotopic perineureum (PN). To test the hypothesis, a permanently denervated segment of the rat sciatic nerve was made acellular by freeze-thawing, except in its most proximal part where non-neuronal cells were left intact. Restoration of the frozen segment by these cells was examined by electron microscopy and immunohistochemistry of the SC marker, S-100 protein, 4 and 8 weeks after injury. The PN regenerated from undifferentiated fibroblast-like cells. In the presence of migrant SC without axons, regenerated cells in the place of the former PN were stacked in several layers and, in accordance with the hypothesis, partially expressed typical features of the perineurial cells (PC): pinocytotic vesicles, short fragments of basal lamina and tight junctions. Migrant SC induced formation of pseudo-minifascicles even in the epineurium. In these, SC organized the adjacent fibroblasts into a multilayered circular sheath, and induced their partial differentiation towards perineurial cells. Further experiments demonstrated that regenerating axons are required for complete morphological differentiation of the regenerated perineurial cells either in the orthotopic PN or in minifascicles.
journal_name
Neuropathol Appl Neurobioljournal_title
Neuropathology and applied neurobiologyauthors
Popović M,Bresjanac M,Sketelj Jdoi
10.1046/j.1365-2990.2000.00238.xkeywords:
subject
Has Abstractpub_date
2000-06-01 00:00:00pages
221-31issue
3eissn
0305-1846issn
1365-2990pii
nan238journal_volume
26pub_type
杂志文章abstract::A disorder of the gracile axonal dystrophy (GAD) mutant mouse is characterized by a neuromuscular disease with sensory ataxia (detectable 30 days after birth) and paresis of the hindlimbs (detectable at 80 days). In the sensory ataxia stage, histological study of the primary sensory system shows that, in addition to t...
journal_title:Neuropathology and applied neurobiology
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journal_title:Neuropathology and applied neurobiology
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journal_title:Neuropathology and applied neurobiology
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journal_title:Neuropathology and applied neurobiology
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更新日期:2016-02-01 00:00:00
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journal_title:Neuropathology and applied neurobiology
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doi:10.1111/j.1365-2990.1986.tb00158.x
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